JP2003285624A - Vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the amplification of the difference between upper and lower blow-out temperatures in a bilevel mode to the degree that a comfortable air conditioning feeling can be provided. <P>SOLUTION: The vehicular air conditioner is provided with a hot air passage where the hot air heated by a heating heat exchanger flows, a cool air passage where the cool air flows by bypassing the heating heat exchanger, a face opening part 35 for a rear seat arranged substantially vertical to the arranging direction of the hot air passage and the cool air passage, and a foot opening part 36 for the rear seat, on the downstream side from the hot air passage and the cool air passage. The hot air from the hot air passage is guided toward the foot opening part 36 for the rear seat by a chevron-shaped hot air guide means 40d. The cool air from the cool air passage is guided toward the face opening part 35 for rear seat by way of an inverted V shaped cool air guide means 116. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air guide structure for obtaining a head cold foot heat type upper and lower outlet temperature distribution in a bilevel mode in a vehicle air conditioner,
In particular, in a vehicle air conditioner capable of independently controlling the temperature of air blown to the front seat and the temperature of air blown to the rear seat using one common heating heat exchanger, a rear seat bilevel mode It is suitable as an air guide structure for the upper and lower blown air temperature distribution.

[0002]

2. Description of the Related Art Conventionally, in Japanese Patent Laid-Open No. 2001-30732, as a heating heat exchanger, one heat exchanger common to the front seat side and the rear seat side is provided in an air conditioning case. The front and rear seat air-mixing doors are installed independently to adjust the air flow rate between the hot air passing through the air conditioner and the cold air bypassing the heat exchanger for heating. There is described a vehicle air conditioner capable of independently controlling the temperature of air blown into the vehicle.

In this prior art, in the heat exchanger for heating, a warm air passage for the rear seat in which warm air for the rear seat flows is formed below the warm air passage for the front seat, and the warm air passage for the rear seat is formed. A cold air bypass passage for the rear seats is formed below. That is, the warm air passage for the rear seat and the cold air bypass passage for the rear seat are arranged vertically.

A rear seat face opening and a rear seat foot opening are arranged in a direction (horizontal direction) of the vehicle which is perpendicular to the direction in which the rear seat passages are arranged (vertical direction). Further, a case wall portion that forms the bottom portion of the rear seat cold air bypass passage is provided with a diaphragm wall portion that restricts only the cool air toward the rear seat foot opening and does not limit the cool air toward the rear seat face opening. ing. Further, in the warm air passage for the rear seat, there is provided a warm air restricting plate that restricts only the warm air toward the face opening for the rear seat and does not restrict the warm air toward the foot opening for the rear seat.

As a result, as the blowing mode on the rear seat side,
When the bi-level mode is set to open the rear seat face opening and the rear seat foot opening at the same time, the warm air in the rear seat warm air passage mainly flows to the rear seat foot opening side, while The cool air in the cold air bypass passage for the seats is allowed to mainly flow toward the face opening for the rear seats, and the temperature of the air blown out from the face opening for the rear seats is lower than the temperature of the air blown out for the foot opening for the rear seats. ing.

[0006]

However, when the above-mentioned conventional apparatus is experimentally studied in detail, it is found that the difference between the face air temperature for the rear seat and the foot air temperature for the rear seat (upper and lower air temperature difference). It has been found that the value becomes a small value of about 2 to 3 ° C., and a comfortable difference between the upper and lower outlet temperatures (about 8 to 12 ° C.) cannot be obtained, which is a problem.

That is, the diaphragm wall provided on the bottom surface of the case of the above-mentioned conventional device only limits the cool air toward the rear seat foot opening, and positively guides the cool air toward the rear seat face opening. Not something to do. Similarly, the warm air restricting plate provided in the warm air passage for the rear seats only restricts the warm air toward the face opening for the rear seats, and actively guides the warm air to the foot opening for the rear seats. Not something to do.

Further, an operating space of the blowout mode door for opening and closing the rear seat face opening and the rear seat foot opening is formed on the downstream side of the diaphragm wall and the hot air restricting plate. Mixing of cold air and warm air occurs in the working space, and the mixed air flows into the face opening for the rear seats and the foot opening for the rear seats. .

In view of the above points, an object of the present invention is to make it possible to expand the upper and lower outlet temperature difference in the bilevel mode to a range where a comfortable air conditioning feeling can be obtained.

In particular, the present invention, in a vehicle air conditioner for adjusting the blowout temperature on the rear seat side by using the front seat air conditioning unit, favorably sets the upper and lower blowout temperature difference in the bilevel mode on the rear seat side. The other purpose is to be able to.

[0011]

In order to achieve the above object, in the invention described in claim 1, the case (11) in which air flows toward the passenger compartment, and the case (11) disposed in the case (11) are provided to remove air. The heating heat exchanger (13) for heating, the hot air passage (17) through which the warm air heated by the heating heat exchanger (13) flows, and the heating heat exchanger (13) are bypassed to generate cold air. The flowing cold air passage (19) and the hot air passage (1) are provided on the downstream side of the warm air passage (17) and the cold air passage (19).
7) and the face opening (35) and the foot opening (36) arranged in a direction substantially perpendicular to the arrangement direction of the cold air passage (19), and the hot air from the warm air passage (17) is opened in the foot. A hot air guide means (40d) for guiding toward the portion (36) and a cold air guide means (116) for guiding cold air from the cold air passage (19) toward the face opening (35). And

According to this, on the downstream side of the hot air passage (17) and the cold air passage (19), the face opening (35) and the foot are arranged in the arrangement direction of the hot air passage (17) and the cold air passage (19). Even when the opening (36) is arranged in a substantially vertical direction, the hot air passage (1
The hot air from 7) can be reliably guided toward the foot opening (36) by the hot air guide means (40d), and
The cold air from the cold air passage (19) is guided by the cold air guide means (11
6) can surely guide toward the face opening (35).

Therefore, the difference between the upper and lower outlet temperatures in the bilevel mode can be sufficiently expanded to a range where a comfortable air-conditioning feeling can be obtained.

According to the second aspect of the present invention, in the first aspect, the case (11) is provided with blowout openings (25, 29, 30) for blowing air to the front seat side in the vehicle compartment. The heating heat exchanger (13) is configured to heat both the air blown to the front seat side and the air blown to the rear seat side of the vehicle compartment, and the hot air passage has the heating air passage. A warm air passage (17) for the rear seat, which is configured by partitioning a part of the heat exchange part (13a) of the exchanger (13), and the cold air passage, the face opening and the foot opening are respectively in the rear seat. Cold air passage (19), face opening for rear seats (35)
And a rear seat foot opening (36).

As a result, in the vehicular air-conditioning system for adjusting the blowout temperature on the rear seat side by using the front seat air-conditioning unit, the upper and lower blowout temperature difference in the bilevel mode on the rear seat side can be favorably set.

According to a third aspect of the present invention, in the second aspect, the warm air passage (17) for the rear seat is arranged above and the cold air passage (19) for the rear seat is the warm air passage (17) for the rear seat. And a rear seat face opening (35) and a rear seat foot opening (36) are arranged side by side in the vehicle left-right direction.

In this way, the rear seat warm air passage (17) is arranged above and the rear seat cold air passage (19) is arranged below, while the rear seat face opening (35) and the rear seat foot are arranged. With the configuration in which the openings (36) are arranged side by side in the left-right direction of the vehicle, the blowout temperature adjusting mechanism on the rear seat side can be integrally configured by using the front seat air-conditioning unit, and such an arrangement structure is also provided. Even in the bi-level mode on the rear seat side, the difference between the upper and lower outlet temperatures can be set well.

According to a fourth aspect of the present invention, in the third aspect, the bottom surface portion of the rear seat foot opening portion (36) is located below the bottom surface portion of the rear seat face opening portion (35). It is characterized by

By the way, in order to restrict the vehicle mounting condition and to secure the required passage area of the foot opening, the bottom of the rear seat foot opening (36) is connected to the rear face opening (3).
It may be necessary to position it below the bottom surface of 5). In this case, if the cold air guide means (116) is not formed, the cold air in the rear seat cold air passage (19) is particularly likely to flow into the rear seat foot opening (36).

However, in the present invention, the cold air guide means (1
By forming 16), the cool air can be reliably guided toward the face opening (35), so that the cold air can be prevented from flowing into the rear seat foot opening (36) to reduce the difference in temperature between the upper and lower outlets in the bi-level mode. It can be ensured.

According to a fifth aspect of the present invention, in the third or fourth aspect, the rear seat face opening portion (35) is arranged at a central portion in the vehicle left-right direction, and the rear seat foot opening portion (3) is provided.
6) are arranged on both left and right sides of the rear seat face opening portion (35), and the warm air guide means (40d) distributes the warm air in the rear seat warm air passage (17) to the left and right sides of the vehicle left and right direction. It is formed in a mountain shape that guides diagonally backward toward
The cold air guide means (116) is characterized in that it is formed in a "C-shape" so as to collect the cold air in the rear seat cold air passage (19) toward the central portion in the vehicle left-right direction.

As a result, the cold air can be reliably introduced into the rear seat face opening (35) located in the center of the vehicle in the left-right direction by the "C-shape" of the cold air guide means (116). The warm air guide means (40) is provided at the rear seat foot openings (36) located on both the left and right sides of the vehicle.
Due to the chevron shape of d), warm air can be reliably introduced.

According to a sixth aspect of the invention, in the fifth aspect, the protrusion height of the chevron of the warm air guide means (40d) is:
It is characterized in that the center portion in the vehicle left-right direction is set to be low and the left and right side portions in the vehicle left-right direction are set to be high.

As a result, of the warm air in the rear seat warm air passage (17), the guiding action of the warm air flowing through the central portion in the vehicle left-right direction is suppressed, and the warm air is supplied to the rear seat foot opening (36). Can be prevented from being introduced excessively. As a result, it is possible to prevent the upper and lower outlet temperature differences from increasing excessively in the bi-level mode on the rear seat side, and to set the upper and lower outlet temperature differences within an appropriate range.

As in the invention described in claim 7, claim 2
1 to 6, the heating heat exchanger (1
The air passage of the heating heat exchanger (13) is provided on the downstream side of the air flow of the heat exchange section (13a) of 3), and the warm air passage for the rear seat (17) is provided.
Switching door (40) for partitioning the front seat warm air passage (16)
The hot air guide means (40) on the switching door (40).
d) is provided so as to project toward the warm air passage (17) for the rear seats, and cold air guide means (116) is provided at the bottom surface portion (115) of the cold air passage (19) so as to project toward the cold air passage (19). You can

As a result, the warm air guide means (40d) is connected to the switching door (40) and the cold air guide means (116).
Can be integrally formed on the bottom surface portion (115) of the cold air passage (19).

The reference numerals in parentheses of the above means indicate the correspondence with the specific means described in the embodiments described later.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

The indoor unit portion of the vehicle air conditioner according to the present embodiment is roughly classified into the air conditioning unit 10 shown in FIG.
And a blower unit (not shown) for blowing air to the air conditioning unit 10.

The blower unit is arranged in the instrument panel (not shown) inside the front portion of the vehicle compartment, offset from the center portion to the passenger seat side. On the other hand, the air conditioning unit 10 is disposed in the front portion of the vehicle compartment. It is arranged in the instrument panel (not shown) at a substantially central portion in the vehicle left-right (width) direction. As is well known, the blower unit has an inside / outside air switching box that selectively introduces outside air (outside vehicle air) and inside air (air inside the vehicle), and a centrifugal blower that blows air taken in through this inside / outside air switching box. There is.

The air-conditioning unit 10 has a resin air-conditioning case 11 which constitutes an air passage for blowing air into the passenger compartment. Inside the air-conditioning case 11, an evaporator 12 serving as a cooling heat exchanger and a heating heat source are provided. Both of the heater cores 13 forming the exchanger are integrally incorporated. The air conditioning unit 10 part is arranged in the mounting direction shown by the arrow in FIG. 1 in the front-rear direction and the up-down direction of the vehicle in the substantially central part inside the instrument panel.

An air inlet space 14 is formed at a portion of the air conditioning case 11 that is closest to the front of the vehicle. The air blown by the centrifugal blower of the blower unit flows into the air inlet space 14.

Air inlet space 1 in air-conditioning case 11
The evaporator 12 is arranged substantially vertically at a position immediately after 4.
As is well known, the evaporator 12 absorbs latent heat of vaporization of the low pressure refrigerant of the refrigeration cycle from the blown air to cool the blown air. A heater core 13 is arranged on the downstream side of the evaporator 12 in the air flow (on the vehicle rear side) with a predetermined space.

The heater core 13 reheats the cold air that has passed through the evaporator 12. Hot water (engine cooling water) of high temperature flows from a vehicle engine (not shown) inside the heater core 13, and the hot water is used as a heat source to generate air. It is to heat.
As is well known, the heater core 13 has a heat exchange core portion 13a composed of a flat tube through which hot water passes and corrugated fins joined to the flat tube. The air passage of the heat exchange core portion 13a has an air conditioner case 11a. Partition member 1
A partition 5 divides the upper front warm air passage 16 from the lower rear warm air passage 17.

Here, the partition member 15 is the heater core 13
Is arranged upstream of the air flow and extends over the entire length of the internal space of the air conditioning case 11 in the vehicle left-right direction (the direction perpendicular to the plane of FIG. 1). In the air passage in the air conditioning case 11, a front seat cold air bypass passage 18 and a rear seat cold air bypass passage 19 in which air (cool air) flows by bypassing the heater core 13 are formed above and below the heater core 13, respectively. Has been done.

Between the evaporator 12 and the heater core 13, a flat air-mix door 20 for the front seat and an air-mix door 21 for the rear seat are rotatably arranged. The front seat air mix door 20 includes the heater core 13
The air volume ratio between the warm air heated in the front seat hot air passage 16 of the heat exchanging core portion 13a and the cool air that bypasses the heater core 13 through the front seat cold air bypass passage 18 is adjusted.

The rear seat air mix door 21 includes warm air heated in the rear seat hot air passage 17 of the heat exchanging core portion 13a of the heater core 13 and the rear seat cold air bypass passage 19.
The air volume ratio with the cold air that bypasses the heater core 13 through the air passage is adjusted.

The both amix doors 20 and 21 are integrally connected to the rotary shafts 20a and 21a, respectively, and can rotate independently around the rotary shafts 20a and 21a. The front seat air mix door 20 constitutes front seat temperature adjusting means for independently adjusting the temperature of the air blown to the front seat side of the vehicle compartment by adjusting the air flow rate. The rear seat air mix door 21 constitutes a rear seat side temperature adjusting means for independently adjusting the temperature of the air blown to the rear seat side of the passenger compartment by adjusting the air flow rate.

Therefore, the rotary shafts 20a and 21a of both the amix doors 20 and 21 are rotatably supported by the air conditioning case 11, and one ends of the rotary shafts 21a and 21b respectively project outside the air conditioning case 11. Here, the protruding end of the rotary shaft 20a of the front seat air mix door 20 is connected to the output shaft of the drive motor of the actuator mechanism via a link mechanism (not shown). Similarly, the protruding end of the rotary shaft 21a of the rear seat air mix door 21 is also connected to the output shaft of the drive motor of the actuator mechanism via a link mechanism (not shown).

Therefore, the rotational position (opening) of the front air mix door 20 and the rotational position (opening) of the rear air mix door 21 can be independently adjusted by the actuator mechanism having the drive motor.

On the other hand, in the air conditioning case 11, a wall surface 22 extending in the vertical direction at a predetermined distance from the heater core 13 is integrated with the air conditioning case 11 at a portion of the heater core 13 on the downstream side of the air flow (vehicle rear side). It is molded. The wall surface 22 forms a front seat case-side warm air passage 23 that extends upward from immediately after the heater core 13. The downstream side (upper side) of the front seat case-side hot air passage 23 joins with the downstream side of the cool air bypass passage 18 in the upper portion of the heater core 13 to mix the cold air and the warm air.
4 is forming.

A defroster opening 25 is formed in a portion of the upper surface of the air conditioning case 11 adjacent to the front air mixing portion 24. This defroster opening 25
A defroster duct (not shown) is connected to the defroster duct, and the conditioned air is blown from the defroster outlet at the tip of the defroster duct toward the inner surface of the vehicle front window glass.

The defroster opening 25 is opened and closed by a flat defroster door 26. This defroster door 26
Is designed to rotate about a rotation shaft 27.
The defroster door 26 communicates with the defroster opening 25 and the communication port 2
Switch 8 to open and close. The communication port 28 serves as a passage for flowing the conditioned air from the air mixing section 24 toward the front seat face opening 29 and the front seat foot opening 30 described later.

A front seat face opening 29 is provided on the upper surface of the air conditioning case 11 at a position rearward of the vehicle (closer to the occupant) than the defroster opening 25. The front seat face opening 29 is shown in the drawing. Not connected to the front seat face air outlet arranged on the upper side of the instrument panel through the front seat face duct, and the conditioned air is blown from the front seat face air outlet toward the occupant's upper body side in the passenger compartment.

Next, in the air conditioning case 11, a front seat foot opening 30 is provided below the front seat face opening 29. The front seat foot opening 30 is connected to a front seat foot outlet 30b opening on both left and right side surfaces of the air-conditioning case 11 via a foot outlet passage 30a, and from the front seat foot outlet 30b. Air is blown to the front passenger's feet on the driver's side and passenger's side.

Between the face opening 29 for the front seat and the foot opening 30 for the front seat, a flat front seat side foot face switching door 31 is rotatably arranged by a rotary shaft 32. The switching door 31 switches and opens the front seat face opening 29 and the front seat foot opening 30.

Here, the defroster door 26 and the front seat side foot face switching door 31 are the front seat blowing mode door means, and the output shaft of the drive motor of the common actuator mechanism via the link mechanism not shown. Connected to.
Therefore, by this common actuator mechanism, both doors 2
6, 31 are designed to be interlocked.

On the other hand, the heat exchange core portion 1 of the heater core 13
3a, the warm air heated in the rear seat warm air passage 17 and the cold air that bypasses the heater core 13 through the rear seat cold air bypass passage 19 are mixed in the rear seat air mixing section 34 to form air at a desired temperature. Become.

A rear seat face opening portion 35 and a rear seat foot opening portion 36 are arranged on the downstream side of the rear seat air mixing portion 34 (on the vehicle rear side). As shown in FIG. 2 (a view in the direction of arrow A in FIG. 1), a rear seat face opening 35 is arranged at the center of the rear lower end of the air conditioning case 11 in the vehicle left-right direction (the direction perpendicular to the paper surface of FIG. 1). Rear foot openings 36 are arranged on both left and right sides of the rear seat face opening 35.

The face opening 3 for the rear seat in the central portion
5, a rear seat face door 37 and a rear seat foot door 38 are rotatably arranged by a rotating shaft 39 in the rear seat foot openings 36 on the left and right sides.

Here, a plurality (three in this example) of rear-seat blowout mode switching doors 37, 38 extend in the left-right direction of the vehicle.
It is connected to the rotary shaft 39 of the book and operated in conjunction with each other, but by changing the mounting angle of each door 37, 38 with respect to the rotary shaft 39, the rotation angle of one rotary shaft 39 changes, and the face opening for the rear seat is opened. The open state of only the portion 35 (rear seat side face mode), the open state of only the rear seat foot opening portion 36 (rear seat side foot mode), and the rear seat face opening portion 35
And a state in which the rear seat foot opening portion 36 is opened at the same time (rear seat side bi-level mode), and both opening portions 35, 3
A state in which 6 is closed at the same time (a rear seat side shut mode) can be selected.

A rear-seat face connecting duct (not shown) is connected to the rear-seat face opening portion 35, and the rear-seat face outlet is provided from the tip of the rear-seat face connecting duct to the upper-body side of the rear-seat occupant. Blow out the air. Further, rear seat foot connection ducts (not shown) are connected to the rear seat foot openings 36 on both the left and right sides, respectively, and the rear seat foot outlets are connected from the rear seat foot outlets at the tips of the rear seat foot connection ducts. Blow out the air.

The rotating shafts 39 of the rear seat blowing mode switching doors 37 and 38 are rotatably supported by the air conditioning case 11, and one end of the rotating shaft 39 projects outside the air conditioning case 11 to form a link mechanism (not shown). Is connected to the output shaft of the drive motor of the actuator mechanism via. Therefore, by this actuator mechanism, the blowout mode switching door 3 for the rear seats
The operating positions of 7 and 38 can be switched.

A switching door 40 is provided at the lower end of the wall surface 22 described above.
Are rotatably arranged by a rotary shaft 41. That is, in the air downstream side portion of the heater core 13, the rotary shaft 41 of the switching door 40 is arranged in the extension direction of the partition position between the front seat warm air passage 16 and the rear seat warm air passage 17, and the switching door 40 is The heater core 13 rotates in a region facing the rear seat warm air passage 17 in the air downstream side portion.

When the switching door 40 is operated to the position shown by the solid line in FIG. 1, the switching door 40 is located on the extension of the partition member 15, and the warm air passage 16 for the front seat and the rear seat temperature of the heater core 13 are heated. The air passage 17 is partitioned and the communication between the rear seat warm air passage 17 and the front seat case side warm air passage 23 is blocked. Therefore, the solid line position in FIG. 1 is the “partition position” of the switching door 40.

Contrary to this, when the switching door 40 is operated to the position of the broken line in FIG. 1, the communication between the rear seat warm air passage 17 and the rear seat air mixing section 34 is cut off, and the rear seat warm air passage is formed. 17 is communicated with the case-side warm air passage 23 for the front seat. Therefore, the broken line position in FIG. 1 is the “rear seat side shut position” of the switching door 40.

Since the switching door 40 is operated in conjunction with the rear seat air mix door 21, one end of the rotary shaft 41 of the switching door 40 is projected to the outside of the air conditioning case 11, and a link mechanism (not shown) is installed. Through the actuator mechanism of the rear seat air mix door 21 described above.

As shown in FIG. 3A, the switching door 40 is a rectangular shape elongated in the left-right direction of the vehicle, and a sealing packing material 40b is formed on both front and rear surfaces of a rectangular plate door portion 40a integrally connected to the rotary shaft 41. , 40c are attached.
Further, the rectangular plate door portion 40a of the switching door 40 is provided with a guide member 40d for guiding the warm air passing through the rear seat warm air passage 17 of the heater core 13 to the left and right rear seat foot openings 36. is there.

The guide member 40d is formed in a mountain shape on the lower surface of the plate door portion 40a of the switching door 40, that is, on the rear seat warm air passage 17 side surface. More specifically, the central portion of the guide member 40d in the left-right direction of the vehicle is located closest to the heater core 13 side (the air flow upstream side), and the side away from the heater core 13 (the air flow direction) toward both sides in the vehicle left-right direction. It has a mountain shape that recedes to the downstream side). Here, the peripheral edge portion of the lower packing material 40c of the plate door portion 40a of the switching door 40 is the case 1
Since the sealing effect is achieved by pressing the sealing surface 42 (FIG. 1) on the first side, the guide member 40d is arranged in a region near the center of the lower packing material 40c except for the peripheral portion.

As shown in FIGS. 3 (b) to 3 (d), the protruding height of the guide member 40a from the lower side surface of the switching door 40 is lowest at the center of the vehicle in the left-right direction, and is set on both sides of the vehicle in the left-right direction. It is formed so that it becomes higher as it goes to. The plate door portion 40a of the switching door 40 and the guide member 4
0d can be integrally molded with the rotating shaft 41 by resin.

Next, FIG. 4 to FIG. 6 show the lower case portion 11 of the air-conditioning case 11, which is formed separately from the upper case portion.
0 indicates a simple substance, 111 is a housing portion of the evaporator 12, 112 is a condensed water discharge port of the evaporator 12, 113 is a sloped surface in the left-right direction of the vehicle that collects condensed water at the condensed water discharge port 112 (see FIG. 6). ). A water splash prevention wall 114 is provided on the downstream side of the inclined surface 113 in the air flow direction over the entire length in the vehicle left-right direction.
To prevent the condensed water of the evaporator 12 from flying to the downstream side of the air flow. Reference numeral 115 denotes a bottom surface portion of the rear seat cold air bypass passage 19.

A guide wall 116 for guiding the cool air in the cold air bypass passage 19 toward the rear seat face opening 35 is integrally formed on the bottom surface 115. The guide wall 116 will be described in detail with reference to FIG.
As shown in FIG. 5, the lower case portion 110 is formed on both left and right sides of the vehicle in the left-right direction of the vehicle in a “C” shape, that is, a shape in which the passage width is narrowed toward the downstream side of the air flow. The guide wall 116 is formed so as to project upward from the bottom surface portion 115 as shown in FIG. Here, the protruding height of the guide wall 116 is close to the height of the side wall parts 117 on the left and right sides of the lower case part 110, as shown in FIG. In FIG. 5, the guide wall 116
The formation range of is shown by the broken line.

The rear seat face opening portion 35 is the lower case portion 1.
It is located at the central portion in the vehicle left-right direction at the vehicle rear side end portion 10. Therefore, a parallel straight line portion having a width dimension corresponding to the width dimension W1 of the rear seat face opening portion 35 in the vehicle left-right direction is provided at the “C-shaped” tip portion (air flow downstream side) of the guide wall 116. 116a is formed.

On the other hand, rear seat foot openings 36 having a width W2 sufficiently smaller than the width W1 are arranged on both left and right sides of the rear face opening 35. Here, as shown in FIGS. 2 and 6, the bottom portion of the rear seat foot opening 36 is pulled down from the bottom portion of the rear seat face opening 35, that is, the bottom portion 115 of the rear seat cold air bypass passage 19. The required passage area of the rear seat foot opening 36 is ensured.

Next, the operation of the present embodiment having the above structure will be described. First, the switching operation of the switching door 40 will be described. Normally, the switching door 40 partitions the front seat warm air passage 16 and the rear seat warm air passage 17 of the heater core 13 as shown by the solid line position in FIG. It is operated to "partition position". However, the rear seat air mix door 21 has the maximum cooling position b1.
When the switch door 40 is operated in accordance with
To the position indicated by the broken line to cut off the communication between the warm air passage 17 for the rear seats and the air mixing portion 34 for the rear seats. That is, the switching door 4
0 is the "rear seat side shut position".

When the defroster mode is set as the blowing mode on the front seat side, the switching door 4 is interlocked with the defroster mode.
0 is the "rear seat side shut position" indicated by the broken line in FIG.
The switching door 40 is always maintained at the “partition position” shown by the solid line in FIG. 1 except during the maximum cooling of the rear seat air mix door 21 and the front seat defroster mode.

By the way, when the face mode is set as the blowing mode on the front seat side and the rear seat side, the defroster door 26 closes the defroster opening 25 to fully open the communication port 28. Further, the front seat side foot face switching door 31 is operated to the broken line position 29a to fully close the front seat foot opening 30 and fully open the front seat face opening 29. Further, the rear seat blowing mode switching doors 37, 38 are operated to the positions shown in FIG. 1 to fully open the rear seat face opening 35 and fully close the rear seat foot opening 36.

At this time, if the front seat air mix door 20 is operated to the position of the broken line a1 in FIG.
The maximum cooling state in which the front seat hot air passage 16 is fully closed and the front seat cold air bypass passage 18 is fully opened is set. In this state, when the blower and the refrigeration cycle of the blower unit are operated, the blown air from the blower unit flows into the air inlet space 14 at the forefront portion of the case 11, and then is cooled by the evaporator 12 to become cool air.

In the maximum cooling state, the cold air as it is passes through the front cold air bypass passage 18, passes through the front air mixing portion 24 and the communication port 28, and the front face opening portion 29.
Towards the front, cold wind blows out from the front seat face outlet (not shown) toward the upper body of the front seat occupant.

When the front seat air mix door 20 is operated from the a1 position (maximum cooling position) in FIG. 1 to the intermediate opening position (solid line position) to control the temperature of the air blown into the passenger compartment on the front seat side, According to the opening position of the seat air mix door 20, a predetermined proportion of cold air passes through the front seat cold air bypass passage 18. The remaining cool air is the warm air passage 16 for the front seat of the heater core 13.
Flows into and is heated to become warm air, and rises in the front seat case side warm air passage 23. Then, the cold air from the front cold air bypass passage 18 and the hot air from the front case warm air passage 23 are mixed in the front air mixing section 24 and adjusted to a desired temperature.

On the other hand, the rear air mix door 21 is shown in FIG.
When the heater core 13 is operated to the position b1 indicated by the broken line, the rear seat warm air passage 17 is fully closed, and the rear seat cold air bypass passage 19 is formed.
Is fully opened, the maximum cooling state on the rear seat side is set. In this maximum cooling state, the cool air from the outlet of the evaporator 12 passes through the cold air bypass passage 19 for the rear seats, goes through the air mixing portion 34 for the rear seats to the face opening portion 35 for the rear seats, and is not shown in the rear seats. Cold wind blows from the face outlet to the upper body of the rear seat occupant.

Since the switching door 40 is in the "rear seat side shut position" shown by the broken line in FIG. 1 during maximum cooling of the rear seat air mix door 21, it passes through the rear seat warm air passage 17 of the heater core 13. It is possible to prevent the leaked hot air from mixing with the cold air by the switching door 40, and the maximum cooling capacity on the rear seat side can be satisfactorily exhibited.

When the rear seat air mix door 21 is operated from the maximum cooling position b1 in FIG. 1 to the intermediate opening position (solid line position), the rear seat warm air passage 17 of the heater core 13 is opened. In conjunction with this, the switching door 40 switches to the “partition position” shown by the solid line in FIG. 1, so that even on the rear seat side,
According to the opening position of the rear seat air mix door 21, cool air from the rear seat cold air bypass passage 19 and the rear seat warm air passage 1
The air volume ratio with the hot air from 7 can be adjusted, and the cool air and the hot air are mixed in the rear seat air mixing section 34, and the desired temperature can be adjusted.

Therefore, by independently controlling the operation positions (rotational positions) of the front seat air mix door 20 and the rear seat air mix door 21, the face air temperature of the front seat and the face air of the rear seat are discharged. Air temperature can be controlled independently.

The above is the operation in the face mode. In addition, (1) the front seat side bi-level mode in which the front seat face opening 29 and the front seat foot opening 30 are simultaneously opened, and the rear seat Front-side foot opening 30 and front-side foot opening 30 are fully opened. (2) Defroster opening 25 is slightly opened and front-side foot opening 30 is fully opened. Seat-side foot mode, rear-seat face opening 35 is closed and rear-seat foot opening 36 is opened. (3) Defroster opening 25 is fully opened and communication port 28
It is possible to select a blowout mode such as a defroster mode that closes up the

In the defroster mode, the switching door 40
Is the "rear seat side shut position" shown by the broken line in FIG. 1, so that all the hot air that has passed through both the front seat warm air passage 16 and the rear seat warm air passage 17 of the heater core 13 passes through the defroster opening 25. It can be blown out toward the vehicle window glass to improve the defroster ability.

In FIG. 1, broken line positions a2 and b2 of the front seat air mix door 20 and the rear seat air mix door 21 indicate the maximum heating position.

Next, the operation of the rear seats in the bilevel mode will be described in detail. In the bi-level mode on the rear seat side,
The rear seat blowing mode switching doors 37, 38 move from the position shown in FIG. 1 to a position where the rear seat face opening 35 and the rear seat foot opening 36 are simultaneously opened. On the other hand, the rear seat air mix door 21 is operated to the intermediate opening position as shown by the solid line in FIG. Therefore, the switching door 40 is operated to the "partition position" shown by the solid line in FIG.

The cold air after passing through the evaporator 12 passes through the cold air bypass passage 19 for the rear seats and the warm air passage 17 for the rear seats of the heater core 13 according to the opening position of the air mix door 21 for the rear seats. It is distributed to the warm air.

A guide member 40d on the lower surface side of the switching door 40 is located downstream of the rear seat warm air passage 17 of the heater core 13. The center of the guide member 40d in the left-right direction of the vehicle is located closest to the heater core 13 side (the upstream side of the air flow), and is retracted to the side away from the heater core 13 (the downstream side of the air flow) as it goes to both sides in the left-right direction of the vehicle. Both ends of the guide member 40d in the vehicle left-right direction are located in the upstream passage of the rear seat foot opening 36, as shown in FIG.

Therefore, the warm air passing through the warm air passage 17 for the rear seat of the heater core 13 is guided obliquely rearward in the vehicle left-right direction along the mountain shape of the guide member 40d as shown by the arrow in FIG. Then, warm air is blown from both ends of the guide member 40d in the vehicle left-right direction on both left and right rear seat foot openings 3
6 can be reliably introduced into the upstream passage portion.

A part of the warm air passes under the central portion of the guide member 40d and is introduced into the upstream passage of the rear seat foot opening 36 as shown by the arrow, and at the same time, as shown by the arrow. A part of the warm air is also introduced to the rear seat face opening 35 side.

On the other hand, the cold air passing through the rear seat cold air bypass passage 19 flows on the bottom surface 115 of the lower case portion 110. The bottom surface 115 has a rear seat face in the center in the vehicle left-right direction. A guide wall 116 is formed so as to protrude upward in the shape of a “C” toward the opening 35. Therefore, the cold air on the bottom surface portion 115 is guided so as to be collected in the central portion in the vehicle left-right direction in the shape of the “C-shape” of the guide wall 116 as shown by the arrow.

The parallel straight line portion 116 at the tip of the guide wall 116 can reliably introduce the cool air into the rear seat face opening 35 as shown by the arrow. A part of the cool air passes over the guide wall 116 as shown by the arrow and is introduced into the upstream passage portion of the left and right rear seat foot openings 36.

As described above, the ratio of the cool air in the air introduced into the rear seat face opening portion 35 is determined by the rear seat foot opening portion 3.
6 can be increased more reliably. On the contrary, in the rear seat foot opening portion 36, the ratio of the warm air of the introduced air can be increased more reliably than in the rear seat face opening portion 35.
As a result, in the bi-level mode on the rear seat side, the face outlet temperature is made sufficiently lower than the foot outlet temperature (8-
It is possible to lower the temperature by about 12 ° C.), and to obtain a comfortable feeling of air conditioning of a head cold foot heat type.

In particular, in this embodiment, since the rear seat side air temperature adjusting mechanism is integrated in the front seat side air conditioning unit 10, the rear seat warm air passage 17 through which the rear seat hot air flows is formed. The cool air bypass passage 19 is located above, and below the rear seat warm air passage 17. On the other hand, since the rear seat face opening portion 35 and the rear seat foot opening portion 36 are arranged side by side in the vehicle left-right direction due to the layout layout of the rear seat side blowing duct, the rear seat side bi-level is originally It is difficult to obtain the temperature distribution of the upper and lower blowing temperatures of the head cold foot heat type in the mode.

However, according to the present embodiment, even with such an arrangement, the warm air guide member 40d of the switching door 40 and the cold air guide wall 116 of the lower case portion 110 are combined to achieve the above. The hot air and cold air guide functions can be realized to reliably obtain the head cold-foot heat type upper and lower blowout temperature distributions.

Further, in the present embodiment, as shown in FIGS. 2 and 6, the width dimension W2 of the rear seat foot opening 36 is sufficiently smaller than the width dimension W1 of the rear seat face opening 35. In order to ensure the required passage area of the seat foot opening 36, the bottom surface of the rear seat foot opening 36 is pulled down from the bottom surface of the rear seat face opening 35 as shown in FIGS. Therefore, when the guide wall 116 for the cold air is not formed in the lower case portion 110, the cold air is more likely to flow into the rear seat foot opening 36 rather than the rear seat face opening 35. According to this, the formation of the cold air guide wall 116 can surely prevent the cold air from preferentially flowing into the rear seat foot opening portion 36.

In this embodiment, the guide member 40a is also used.
As shown in FIGS. 3 (b) to 3 (d), the height of the protrusion is the lowest at the center of the vehicle in the left-right direction and increases toward both sides in the left-right direction of the vehicle. As a result, at the center portion of the guide member 40a in the vehicle left-right direction, part of the warm air passes under the guide member 40a as shown by the arrow in FIG. 7 and flows into the rear seat face opening 35. Therefore, it is possible to prevent the hot air inflow to the rear seat foot opening 36 from being excessive (in other words, the hot air inflow to the rear seat face opening 35 to be too small), and to prevent the rear seat side bi-level mode. At times, it is possible to prevent the difference between the upper and lower outlet temperatures from increasing excessively. At the same time, the increase in pressure loss on the warm air side due to the guide member 40a can be suppressed to a small amount.

(Other Embodiments) In the above-described one embodiment, the case where the downstream passage of the heat exchange portion 13a of the heater core 13 is partitioned by the switching door 40 has been described.
The present invention may be applied to a configuration in which the downstream passage of the heat exchange portion 13a of the heater core 13 is partitioned by a fixed partition plate provided in the air conditioning case 11, as in Japanese Patent Laid-Open No. 2001-30732. In this case, the guide member 40d of the switching door 40 may be formed on the lower surface side of the fixed partition plate provided in the air conditioning case 11.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an air conditioning unit portion of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1, showing the arrangement of a rear seat face opening and a rear seat foot opening.

FIG. 3A is a front view of the switching door of FIG. 1, showing a cutaway view of a part of the packing material. (B) is a side view of (a), (c) is a view on arrow F of (a), and (d) is a view on arrow E of (a).

FIG. 4 is a plan view of a lower case portion of the air conditioning case of FIG.

FIG. 5 is a front view of FIG.

FIG. 6 is a side view of FIG.

FIG. 7 is an explanatory view of an air guide action according to the embodiment of the present invention.

[Explanation of symbols]

11 ... Air conditioning case, 12 ... Evaporator (cooling heat exchanger),
13 ... Heater core (heating heat exchanger), 16 ... Warm air passage for front seat, 17 ... Warm air passage for rear seat, 19 ... Cold air bypass passage for rear seat, 21 ... Air mix door for rear seat, 35 ... Rear Seat face opening, 36 ... Rear seat foot opening, 40 ...
Switching door, 40d ... Warm air guide member (warm air guide means), 116 ... Cold air guide wall (cold air guide means).

Continued front page    (72) Inventor Koji Matsunaga             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO F-term (reference) 3L011 BP02

Claims (7)

[Claims] 1. A case (11) in which air flows toward a passenger compartment, a heating heat exchanger (13) arranged in the case (11) for heating the air, and the heating heat exchanger. A hot air passage (17) through which warm air heated in (13) flows, a cold air passage (19) through which cold air flows by bypassing the heating heat exchanger (13), the hot air passage (17) and On the downstream side of the cold air passage (19), a face opening (35) and a foot opening (35) arranged in a direction substantially perpendicular to the arrangement direction of the warm air passage (17) and the cold air passage (19). 36)
And a warm air guide means (40) for guiding the warm air from the warm air passage (17) toward the foot opening (36).
d) and cold air guide means (11) for guiding the cold air from the cold air passage (19) toward the face opening (35).
6) An air conditioner for a vehicle, comprising: 2. The case (11) is provided with blowout openings (25, 29, 3) for blowing air to the front seat side in the passenger compartment.
0) is provided, and the heating heat exchanger (13) is configured to heat both the air blown to the front seat side and the air blown to the rear seat side of the vehicle compartment. The warm air passage is a rear seat warm air passage (17) configured by partitioning a part of the heat exchange section (13a) of the heating heat exchanger (13), and the cold air passage, The face opening and the foot opening are a rear seat cold air passage (19), a rear seat face opening (35) and a rear seat foot opening (36), respectively. The vehicle air conditioner described. 3. The rear seat warm air passage (17) is arranged above, and the rear seat cold air passage (19) is arranged below the rear seat warm air passage (17). The vehicle air conditioner according to claim 2, wherein the face opening (35) for the vehicle and the foot opening (36) for the rear seat are arranged side by side in the vehicle left-right direction. 4. The bottom seat of the rear seat foot opening (36) is located below the bottom seat of the rear seat face opening (35). Vehicle air conditioner. 5. The rear seat face opening (35) is arranged in the center of the vehicle in the left-right direction, and the rear seat foot opening (36) is on both left and right sides of the rear seat face opening (35). The warm air guide means (40d) is formed in a mountain shape that guides the warm air in the rear seat warm air passage (17) diagonally rearward toward the left and right sides of the vehicle left-right direction. The cold air guide means (116) is formed in a “C-shape” so as to collect the cool air in the rear seat cold air passage (19) toward the central portion in the vehicle left-right direction. The vehicle air conditioner according to claim 3 or 4. 6. The hot air guide means (40d) has a chevron-shaped protrusion height that is set so that the central portion in the vehicle left-right direction is low and the protrusions in the vehicle left-right direction are high. The vehicle air conditioner according to claim 5. 7. An air passage of the heating heat exchanger (13) is provided downstream of the heat exchange section (13a) of the heating heat exchanger (13) in the air flow direction (17). ) And a warm air passage (16) for the front seat, a switching door (40) is arranged, and the warm air guide means (40d) is provided on the switching door (40).
Is provided so as to protrude toward the warm air passage (17) for the rear seat, and the cold air guide means (116) is protruded toward the cold air passage (19) on the bottom surface portion (115) of the cold air passage (19). The vehicle air conditioner according to any one of claims 2 to 6, wherein the vehicle air conditioner is provided.